Robert (1153/4–1159/60) was the second son of King William I of Sicily and his queen, Margaret of Navarre.
Robert's Latin title, princeps Capuanorum, means literally "Prince of Capuans".
The latter, who had been deposed in 1135, returned in 1155–56 in an effort to reclaim his principality.
[3] The young Robert's rule in Capua can be traced in documents between September 1158 and May 1159, but he had died by February–March 1160, when his father was once again ruling Capua directly.
[4] Eventually, Robert's younger brother Henry was appointed Prince of Capua in May 1166.